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  • Kidde | 870Ex Series Explosionproof Diode Polarized Vibrating Horn, 107 dB, 24 VDC, Gray, NEMA 4X, Surface Mount | 879DEX-G1
870Ex Series Explosionproof Diode Polarized Vibrating Horn, 107 dB, 24 VDC, Gray, NEMA 4X, Surface Mount
Kidde Commercial

870Ex Series Explosionproof Diode Polarized Vibrating Horn, 107 dB, 24 VDC, Gray, NEMA 4X, Surface Mount

SKU KD-879DEX-G1

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The Kidde 879DEX-G1 is an explosionproof, diode-polarized vibrating horn built for life safety notification in classified hazardous locations. Rated at 107 dB and powered by 24 VDC, it ties directly into the fire alarm panel's NAC circuit with no additional power supply required.

Built for hazardous environments

UL and ULC listed for Class I Division 1 and 2 (Groups B, C, D), Class II Division 1 and 2 (Groups E, F, G), and Class III locations. The NEMA 4X gray heat-flowed epoxy finish resists corrosion in chemical plants, refineries, grain facilities, and other classified areas where standard notification appliances can't go.

Key features

  • 107 dB output at 24 VDC - delivers clear audible notification in high-noise industrial environments
  • Diode polarized for compatibility with supervised NAC circuits on modern fire alarm panels
  • NEMA 4X enclosure with corrosion-resistant gray heat-flowed epoxy finish
  • Surface mount to any solid surface using two bolts with 3/4" NPT conduit entry
  • Low current draw keeps NAC circuit loading manageable across large hazardous-area installations
  • UL and ULC listed (E14660) for code-compliant deployment in classified locations

Installation

Each unit ships with a sealing fitting, 3/4" NPT nipple, and wire leads for connection to the NAC circuit. Requires an explosion-proof conduit outlet box (not supplied). Mounts via two brackets using 3/8" diameter maximum fasteners.

Specifications

SKUKD-879DEX-G1
BrandKidde Commercial
Form factorExplosionproof vibrating horn, surface mount
Power input24 VDC (from NAC circuit)
Sound output107 dB
PolarizationDiode polarized
Conduit entry3/4" NPT
Enclosure ratingNEMA 4X
FinishGray, corrosion-resistant heat-flowed epoxy
MountingSurface mount, two bolts, 3/8" max fastener diameter
Hazardous location ratingClass I Div. 1 & 2 (Groups B, C, D), Class II Div. 1 & 2 (Groups E, F, G), Class III
ComplianceUL, ULC (E14660)

Documents and resources

FAQs

What hazardous locations is the 879DEX-G1 rated for?
UL and ULC listed for Class I Division 1 and 2 (Groups B, C, D), Class II Division 1 and 2 (Groups E, F, G), and Class III hazardous locations. Suitable for chemical plants, refineries, grain handling facilities, and other classified environments.
Does this horn work on a 24 VDC NAC circuit?
Yes. The 879DEX-G1 operates on 24 VDC and is diode polarized for compatibility with supervised NAC circuits on modern fire alarm control panels.
Can this horn be installed outdoors?
Yes. The NEMA 4X enclosure rating and corrosion-resistant heat-flowed epoxy finish make it suitable for outdoor and harsh-environment installations in classified locations.
What conduit connection does this horn require?
Standard 3/4" NPT. Each unit ships with a sealing fitting, NPT nipple, and wire leads. An explosion-proof conduit outlet box is required but not supplied.
Is this horn UL listed for hazardous locations?
Yes. UL and ULC listed under file E14660 for installation in Class I, Class II, and Class III hazardous (classified) locations.
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